/*
 *     Android基础开发个人积累、沉淀、封装、整理共通
 *     Copyright (c) 2016. 曾繁添 <zftlive@163.com>
 *     Github：https://github.com/zengfantian || http://git.oschina.net/zftlive
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */

package com.zftlive.android.library.widget.fixedheadtable.adapter;

import android.database.DataSetObservable;
import android.database.DataSetObserver;

/**
 * Common base class of common implementation for an {@link TableAdapter} that
 * can be used in {@link TableFixHeaders}.
 * 
 * @author Brais Gab韓 (InQBarna)
 */
public abstract class BaseTableAdapter implements TableAdapter {
	private final DataSetObservable mDataSetObservable = new DataSetObservable();

	@Override
	public void registerDataSetObserver(DataSetObserver observer) {
		mDataSetObservable.registerObserver(observer);
	}

	@Override
	public void unregisterDataSetObserver(DataSetObserver observer) {
		mDataSetObservable.unregisterObserver(observer);
	}

	/**
	 * Notifies the attached observers that the underlying data has been changed
	 * and any View reflecting the data set should refresh itself.
	 */
	public void notifyDataSetChanged() {
		mDataSetObservable.notifyChanged();
	}

	/**
	 * Notifies the attached observers that the underlying data is no longer
	 * valid or available. Once invoked this adapter is no longer valid and
	 * should not report further data set changes.
	 */
	public void notifyDataSetInvalidated() {
		mDataSetObservable.notifyInvalidated();
	}
}
